Which exchange, broker sold my name to Vegas scammer Leonard Benson company?

I've been getting mail, not email, form Leonard Benson company for a couple years now and I want to know how these worm scammers got my name? The promo material reads the same as the system vendors. Buy their blackjack/craps/whatever system and make millions gambling the way the pros do. LOL what a bunch of crap. They had to of bought a list from somewhere and the only connection I can see is the brokers or exchanges.
It maybe worth showing up on their doorstep, as well as the usual scam operations.